Insurance won's pay for an MRI. Have had "sharp" pain for 6 weeks now, but it is becoming less. Taking Naproxen twice daily and using ice 3 times per day. Not sure what the injury is, but I'm speculating that it is an MCL tear since the pain is mostly on the inner half of the knee. I was unable to walk up stairs for a few weeks, but now can with some pain. Able to walk, but not run. I really want to get back to playing tennis ASAP. My doctor was useless and my insurance company is even more useless. It seems from what I read that it takes about 2 months for an MCL tear to heal. Is this correct? How long should I wait to play sports again? If I come back too soon, will I have to start over? Any experience with this would be appreciated.